BTW- I didnt get involved in all the discussions and rumors about the Dickinson amp on PP and other forums. The authenticity of the tone stack values is still a question correct? If so it seems to me 33k/500p probably werent stock. Maybe it was a mistake by the owner. It just seems weird. Were there any other 66 KT66 amps that had those later values? Not just that but it also seems that since it is known that they were replaced why the hell else would you ever change the slope and treble cap other then to mod the values? Unless what the claim is is actually that it was changed out while Hendrix owned the amp?

Fantasic job. Exactly what I was looking for. I am an aspiring Marshall affectionado and I was looking for something that showed the layout and the connections. I still haven't quite mastered schematics as of yet.
Thanks again!

These are up to date. There are little inconsistencies with the CD layouts. Their basically correct though. No real mistakes. If you read the first reply you can see everything Ive fixed or added to the layotus since being put up which means anythign listed there will still be a problem on the CD layout.

Hey George. If you read this and your not too busy, if you still include the layouts on the CD maybe you can replace them with the updated versions here.

Thank you for posting such informative and precise layouts. They've been a huge help.

I had a guestion about a few of the component values by the rectifier diodes. It appears that there are 2 caps and 1 resistor, with no values specified. The 69 era plexi layout has values of 10 or 8 uF for the caps, but it also doe not show a resistor value.

You answered your own question. The 2 bias caps are 8 or 10u. Whichever you can get. I cant be sure which resister your refering to. The one thats attached to the PT is usually 27k in 100W amps and 220k in 50W amps. The rsistor betweent he 2 caps is always 15k and the resistor paralleled to the second cap sets the bias level so its different for every set of tubes. With a bias pot instaleld and for EL34s its usually a 47k resistor.